Series序列创建的几种方式

1.通过给定数值创建序列

import pandas as pd
s = pd.Series(5, index=range(5))

2.通过NumPy数组创建序列

import pandas as pd
import numpy as np
arr = np.array(['A', 'B', 'C', 'D'])
s = pd.Series(arr)

3.通过列表创建序列

import pandas as pd
s = pd.Series(['A', 'B', 'C', 'D'], index=range(4))

3.通过字典创建序列

import pandas as pd
s = pd.Series({0: 'A', 1: 'B', 2: 'C'})